First flight with baby!

Vanita • ❤️ 9.14.13 👦🏽 5.11.15 👧🏽 10.13.17
Hi! Our little boy, Penn, is just shy of 12 weeks old. I'll be flying with him for the first time in about 3 weeks. My husband can't join me so I'm looking for some mamas who have done this who can offer advice! 
We also want to take a family trip in December. Any suggestions on international family friendly locations??